////////////////////////////////////////////////////////////////////////////////
// Copyright (c) 2009 Daniel F. Hanson
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
////////////////////////////////////////////////////////////////////////////////

using System.Collections.Generic;

namespace SilverLua.Compiler
{
   internal class MemberVariableNode : VariableNode
   {
      internal PrefixExpressionNode Prefix { get; private set; }
      internal string Member { get; private set; }
      
      internal MemberVariableNode(PrefixExpressionNode prefix, string member)
      {
         Prefix = prefix;
         Member = member;
      }

      internal override void GenerateAssign(EvaluateNode expr, Parser parser, int currentChunk)
      {
         EvaluateNode table = Prefix.Evaluate(parser, currentChunk);

         parser.ChunkList[currentChunk].Add(new Instruction(Opcode.SetTable,
                                                            new[] { table.OperandType,
                                                                    OperandType.StringLiteral,
                                                                    expr.OperandType },
                                                            new[] { table.OperandValue,
                                                                    parser.ChunkList[currentChunk].ResolveString(Member),
                                                                    expr.OperandValue }));
      }

      internal override void EvaluateTo(int register, Parser parser, int currentChunk)
      {
         EvaluateNode table = Prefix.Evaluate(parser, currentChunk);

         parser.ChunkList[currentChunk].Add(new Instruction(Opcode.GetTable,
                                                            new[] { OperandType.Value,
                                                                    table.OperandType,
                                                                    OperandType.StringLiteral },
                                                            new[] { register,
                                                                    table.OperandValue,
                                                                    parser.ChunkList[currentChunk].ResolveString(Member) }));
      }
   }
}
